Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7677038 | Pump unit There is provided a pump unit including plurality of hydraulic pumps respectively fluidly connected to plurality of hydraulic motors, which are disposed away from the pump unit, so as to form closed circuits, the pump unit including a pump case accommodating the plu... | 03/16/2010 |
| 7412829 | Hydraulic apparatus for a bicycle brake lever device A hydraulic apparatus such as a bleeder screw comprises an inner end, an outer end, and a main body extending between the inner end and the outer end. The main body includes a first section having a threaded outer peripheral surface a second section disposed between... | 08/19/2008 |
| 7343740 | Orifice element with integrated filter, slow return valve, and hydraulic drive unit A filter-integrated orifice element is provided which can reduce manufacturing costs and assembling costs in a hydraulic circuit for which size reduction is desirable. A filter-integrated orifice element is obtained by integrating a filter for removing an obstacle w... | 03/18/2008 |
| 7261123 | Reservoir tank of a power steering system for a car A reservoir tank of power steering system for a car includes an inlet port delivering oil through a swirl prevention member. The oil is then allowed to flow so swirl does not form in the oil flow of a reservoir tank. Furthermore, bubble formation in the oil is minim... | 08/28/2007 |
| 7255730 | Fluid deceleration/de-aeration device A fluid deceleration device is provided for a hydraulic system having a housing forming a sump, and a valve unit having an outlet port through which hydraulic fluid is expelled for communication to the sump. The fluid deceleration device includes an elongated tilted... | 08/14/2007 |
| 7234300 | Fastener and valve for a hydraulic apparatus An improved diagnostic system for a hydrostatic apparatus such as a hydrostatic transmission or transaxle is disclosed. A fastener having a port formed therein is used to connect a hydraulic component such as a center section to a housing. A diagnostic system may be... | 06/26/2007 |
| 7232518 | Filter device A filter device includes at least one filter unit (10), connectable to a hydraulic circuit (14), with at least one supply line (16), one discharge line (18), and at least one cooling unit (22). The cooling unit is connected to a se... | 06/19/2007 |
| 7225719 | Speed governor and distributing valve for hydraulic turbines A distributing valve for a speed governor of a turbine is provided, the distributing valve having a structure to reliably vent air therefrom. The distributing valve is disposed such that the direction of movement of a plunger is horizontal, with air vent valves bein... | 06/05/2007 |
| 7210294 | Hydrostatic transaxle An expansion sump is provided in the axle horn of a hydraulic apparatus, and a cap member seals the expansion sump from the main sump. An arcuate sealed fluid passage is provided between the periphery of the cap member and the housing. The sealed fluid passage coope... | 05/01/2007 |
| 7155907 | Electro-hydraulic fan drive cooling and steering system for vehicle An electro-hydraulic system for operating a cooling fan and providing hydraulic fluid to a power steering system of the vehicle includes a hydraulic pump unit including first and second fixed displacement pumps and a common drive shaft for these pumps. A hydraulic f... | 01/02/2007 |
| 7121191 | Air-operated brake actuator with control valve An air-operated brake actuator system of a vehicle comprises a spring brake actuator and a service brake actuator, the spring brake actuator including a sealed housing with a spring chamber and a pressure chamber, and a hollow actuator rod disposed in the spring bra... | 10/17/2006 |
| 7121389 | Oil system The invention relates to an improved system for supplying filtered oil to wet brakes of the tractor without additional/auxiliary pump. The system comprises of a suitably sized connection provided on the drain line of the Hydraulic system, which supplies required qua... | 10/17/2006 |
| 7100372 | Vehicle air compressor device The present invention provides a vehicle air compressor device which includes a motor device serving as a driving power source, and a drier device that conducts compressed air; the drier device arranged opposite to the motor device; and a supporting member for suppo... | 09/05/2006 |
| 7100744 | Internal combustion engine An engine is described having a hole for a dipstick which is closed by a cap from which the dipstick depends. The engine body is formed with an overhanging lip adjacent the mouth of the hole, and the cap comprises a spigot rotatably received in the mouth of the hole... | 09/05/2006 |
| 7082758 | Hydraulic machine, system for monitoring health of hydraulic machine, and method thereof In a hydraulic machine, hydraulic pump failure is detected and the pump lifespan is estimated before the pump failure occurs. The discharge pressure 122, oil temperature 126, and drain filter differential pressure 120 are measured, a correlative... | 08/01/2006 |
| 7059563 | Systems, apparatuses, and methods for moving aircraft control surfaces Aircraft control surface operating systems and apparatuses, and associated methods of use. In one embodiment, an aircraft system includes an actuator operably coupled to a control surface in one-to-one correspondence. The actuator can include at least a first fluid ... | 06/13/2006 |
| 7017446 | Axle driving apparatus An axle driving apparatus wherein a hydraulic motor and a hydraulic pump for a hydro-static-transmission are housed in a transmission casing of the axle driving apparatus and a center section for connecting the hydraulic motor and hydraulic pump is disposed in the t... | 03/28/2006 |
| 7017343 | Hydrostatic transmission with pressure regulation means A hydrostatic transmission comprising a housing formed with a fluid sump, a center section disposed within the fluid sump, a hydraulic pump mounted on the center section, and a hydraulic motor mounted on the center section. A fluid passage is formed in the center se... | 03/28/2006 |
| 7013642 | Clutch bleeder tool apparatus and method The present invention provides a clutch bleeder tool assembly to force air bubbles from a clutch hydraulic control assembly of a standard vehicle transmission. The clutch bleeder tool assembly includes an adaptor cap to replace the factory cap on the hydraulic fluid... | 03/21/2006 |
| 6964162 | Hydraulic pressure generating apparatus A hydraulic pressure generating apparatus includes a hydraulic oil feed line for feeding hydraulic oil with high pressure from an oil tank to a hydraulic pressure control system of a generator by an oil feeding pump unit, a hydraulic oil return line for returning dr... | 11/15/2005 |
| 6913040 | Hydraulic fluid reservoir A hydraulic fluid reservoir apparatus for an automotive power steering system comprises a filter chamber, and a filter parallel to a vertical axis and dividing the filter chamber into an upstream region and a downstream region. The reservoir apparatus also includes ... | 07/05/2005 |
| 6899070 | Engine with dual oiling and hydraulic valves An internal combustion engine has a plurality of cylinders containing pistons connected with a crankshaft for transmitting power. The cylinders have closed ends, intake and exhaust ports communicating with the cylinders through the closed ends, valves operable to op... | 05/31/2005 |
| 6880334 | Filter for hydrostatic transmission In a hydrostatic transmission or integrated hydrostatic transaxle having a housing forming an oil sump and a hydraulic pump and hydraulic motor mounted in the sump and connected through hydraulic porting, a filter housing or other structure defining an internal volu... | 04/19/2005 |
| 6783334 | Hydraulic pump reservoir having deaeration diffuser A hydraulic fluid reservoir for a hydraulic power system includes a reservoir housing having an internal chamber for containing a supply of hydraulic fluid, an outlet for communicating the fluid from the housing to an inlet of a hydraulic pump, and a return flow inl... | 08/31/2004 |
| 6658842 | Hydraulic system A hydraulic system includes an air sucking hydraulic circuit 8, an air sucking control valve 5, and a check valve 6 provided in or before and after the air sucking hydraulic circuit 8, hereby allowing a hydraulic fluid from the air sucking control valve 5... | 12/09/2003 |
| 6648311 | Assembly and method of exercising an airplane landing gear strut A strut exercise assembly for an aircraft comprises a fluid strut telescopic along a path. A couple selectively connects the fluid strut to a driver. The driver telescopes the fluid strut along a path through the couple.... | 11/18/2003 |
| 6622673 | Oil pressure control apparatus for an internal combustion engine An oil pressure control apparatus for an internal combustion engine that has a source of hydraulic pressure and a hydraulic actuator which is actuated by hydraulic pressure provided via a fluid passage which is in communication with the source of hydrauli... | 09/23/2003 |
| 6598696 | Device and method for purging trapped air from a vehicle steering gear housing The present invention involves a purge device for a steering gear assembly of a vehicle. The steering gear assembly includes a steering piston chamber having a piston moveably housed therein and having a hydraulic assist port formed on the steering piston... | 07/29/2003 |
| 6568926 | Fluid metering pump A pump (10) includes a chamber (14) communicating with a fluid inlet (12) and a fluid outlet (13) above the centerline thereof to minimize dead air space where air bubbles might form. A connector (21) having a bend or elbow (26) is formed at the fluid inl... | 05/27/2003 |
| 6418714 | Accumulator utilizing housing case pressure The present invention meets these objectives providing an IDG hydraulic system that utilizes in flow series arrangement a scavenge pump, a spool valve and a boost pump. When spool valve detects an interruption in the supply pressure to the boost pump due ... | 07/16/2002 |
| 6382148 | Oil pressure control apparatus for an internal combustion engine An oil pressure control apparatus which includes a source of hydraulic pressure introducing the hydraulic pressure to a hydraulic actuator which is actuated by hydraulic pressure, a fluid passage which is connected between the source of hydraulic pressure... | 05/07/2002 |
| 6250199 | Subsea power module A subsea hydraulic control module that is totally enclosed such that the hydraulic fluid does not contact the seawater. The majority of the power for the module comes from the hydrostatic pressure of the sea itself. Two oil-over-seawater actuators each ha... | 06/26/2001 |
| 6227221 | Single-fluid apparatus for supplying vehicle power and lubrication fluid requirements and a system and method for fluid distribution and delivery A single-fluid, multiple-reservoir hydraulic system and a method and system for fluid distribution are provided. The single-fluid, multiple-reservoir hydraulic system utilizes a single-fluid to supply all vehicle power and lubrication fluid requirements. ... | 05/08/2001 |
| 6212887 | Axle driving apparatus An axle driving apparatus, wherein at the interior of a housing is formed an internal fluid sump, and are disposed a fluid circuit, which fluidly connects a hydraulic pump with a hydraulic motor so as to constitute a hydrostatic stepless transmission, and... | 04/10/2001 |
| 6189319 | Removal of air from hydraulic system An arrangement for removing contaminants from a hydraulic system includes a portable fluid pump for introducing fluid into or evacuating fluid from the hydraulic system and a resilient adapter capable of conforming to openings of different size in the hyd... | 02/20/2001 |
| 6113365 | Piston pump The invention relates to a piston pump for a slip-controlled hydraulic vehicle brake system. The piston pump has a piston which is driven to execute a stroke motion, and two check valves as an inlet valve and outlet valve for controlling the fluid flow th... | 09/05/2000 |
| 6079206 | Hydraulic system and a method for degassing same A hydraulic actuator and a method for degassing hydraulic actuators having t least two chambers are disclosed. For actuating a hydraulic element, for example a piston in a piston-and-cylinder unit the hydraulic actuator may be supplied with pressurized hyd... | 06/27/2000 |
| 6074177 | Air compressor with air drier having a bypass passage disposed in the air drier The present invention provides an air compressor which includes an air drier filled with a drying agent and having a first passage for supplying compressed air to one air supplied part while absorbing moisture from the compressed air by passing the compre... | 06/13/2000 |
| 6050089 | Remotely located brake booster A remotely located brake booster for supplying an input force to a pressurizing device to develop pressurized fluid to effect a brake application. The brake booster responds to an actuation signal in the form of pressurized fluid being communicated from a... | 04/18/2000 |
| 6029445 | Variable flow hydraulic system A variable flow hydraulic system including a fixed displacement pump and a variable displacement pump for supplying pressurized hydraulic fluid in a machine is disclosed herein. Along with the dual pumps, the system includes a reservoir, a flow sensitive ... | 02/29/2000 |
